Small Craft Advisory

URGENT - MARINE WEATHER MESSAGE
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
936 AM EDT MON MAR 19 2018
...STRONG ONSHORE WIND AND ELEVATED WAVES THROUGH WEDNESDAY...
.HIGH PRESSURE WILL BUILD FROM NORTHERN ONTARIO INTO THE CENTRAL
GREAT LAKES TODAY. IT WILL COMBINE WITH LOW PRESSURE MOVING THROUGH
THE OHIO VALLEY AND SHARPEN LOW LEVEL GRADIENT FLOW FROM THE
NORTHEAST TODAY THROUGH WEDNESDAY. THE INCOMING AIR MASS WILL ALSO
BE COLD ENOUGH TO PRODUCE AN UNSTABLE THERMAL PROFILE OVER THE
WATER. THIS, ALONG WITH THE LONG NORTHEAST FETCH, WILL LEAD TO
FAVORABLE CONDITIONS FOR HIGH WAVES ACROSS CENTRAL AND SOUTHERN LAKE
HURON INTO SAGINAW BAY. THE FETCH WILL BE SHORTER OVER WESTERN LAKE
ERIE BUT GUSTS WILL APPROACH 30 KNOTS BY TUESDAY MORNING. BOTH WIND
GUSTS AND WAVE HEIGHT WILL BE MARGINAL FOR SMALL CRAFTS ON LAKE ST
CLAIR. THE SLOW PROGRESSION OF THE LOW PRESSURE SYSTEM THROUGH THE
OHIO VALLEY WILL SET UP PERSISTENCE OF THE WIND PATTERN THROUGH
WEDNESDAY. SMALL CRAFT ADVISORIES REMAIN IN EFFECT DURING THIS TIME
FOR OUTER SAGINAW BAY AND SOUTHERN LAKE HURON, AND ARE ADDED FOR THE
MICHIGAN WATERS OF LAKE ERIE.
LHZ421-441>443-200815-
/O.CON.KDTX.SC.Y.0007.000000T0000Z-180321T2000Z/
OUTER SAGINAW BAY SW OF ALABASTER TO PORT AUSTIN MI TO INNER
SAGINAW BAY-PORT AUSTIN TO HARBOR BEACH MI-
HARBOR BEACH TO PORT SANILAC MI-PORT SANILAC TO PORT HURON MI-
936 AM EDT MON MAR 19 2018
...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 4 PM EDT
WEDNESDAY...
* WIND AND WAVES: DURING THE SMALL CRAFT ADVISORY...EXPECT
SUSTAINED WINDS UP TO 22 KNOTS FROM THE NORTHEAST WITH GUSTS
UP TO 31 KNOTS. THE LARGEST EXPECTED SIGNIFICANT WAVES WILL
BE 7 FEET WITH A POTENTIAL MAXIMUM WAVE HEIGHT OF 10 FEET.
* TIMING: THE MAXIMUM WINDS ARE EXPECTED AROUND 9 AM EDT TUESDAY
WITH THE LARGEST WAVES EXPECTED AROUND 11 PM EDT TUESDAY.
REFER TO THE LATEST MARINE FORECASTS FOR GREATER DETAIL.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A SMALL CRAFT ADVISORY MEANS THAT WIND SPEEDS OF 21 TO 33 KNOTS
ARE EXPECTED TO PRODUCE HAZARDOUS WAVE CONDITIONS TO SMALL CRAFT.
INEXPERIENCED MARINERS...ESPECIALLY THOSE OPERATING SMALLER
VESSELS SHOULD AVOID NAVIGATING IN THESE CONDITIONS.
&&
$$
JVC

U.S. Dept. of Commerce
NOAA National Weather Service
1325 East West Highway
Silver Spring, MD 20910
E-mail: w-nws.webmaster@noaa.gov
Page last modified: May 16, 2007